/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.euphoria.core.translate;



import com.bff.gaia.unified.sdk.extensions.euphoria.core.client.operator.base.Operator;

import com.bff.gaia.unified.sdk.values.PCollection;

import com.bff.gaia.unified.sdk.values.PCollectionList;



/**

 * A functor to translate an operator into a unified execution.

 *

 * @param <InputT> the type of input elements

 * @param <OutputT> the type of output elements

 * @param <OperatorT> the type of the euphoria operator

 */

public interface OperatorTranslator<InputT, OutputT, OperatorT extends Operator> {



  /**

   * Translates the given a operator it into a concrete unified transformation.

   *

   * @param operator the operator to translate

   * @param inputs list of inputs

   * @return a unified transformation

   */

  PCollection<OutputT> translate(OperatorT operator, PCollectionList<InputT> inputs);



  /**

   * Returns true when implementing {@link OperatorTranslator} is able to translate given instance

   * of an operator, false otherwise.

   *

   * <p>This method allow us to have more {@link OperatorTranslator} implementations for one {@link

   * Operator} in case when some specialized translators are needed.

   *

   * @param operator operator to check

   * @return true if operator can be translated

   */

  default boolean canTranslate(OperatorT operator) {

    return true;

  }

}